ex_spi_show_zc model simulates a ball
bouncing on a hard surface.
Select the Zero Crossing option in
Configure section of toolstrip, then click the
Run button on the Solver Profiler. The model
648 steps and triggers
crossing events. To highlight the zero crossing events on the step size plot, click
the Zero Crossing tab from the Diagnostics
pane and select the
ex_spi_show_zc/Switch block that is causing
the zero-crossing events. Notice that the zero crossing events are displayed on the
Step Size plot as yellow dots.
The result indicates that when the ball drops on the hard surface, it bounces 45 times before coming to a stop. The solver resets after each bounce, increasing the computational load. Having many resets improves accuracy at the cost of computation load. Therefore, it is important to know this tradeoff when modeling.
If this modeling construct belonged to a larger model, the Solver Profiler would help
you locate it. You could then modify the model to improve solver performance. For
example, you can decide to reduce the accuracy of the contact dynamic by increasing
the damping factor, which would reduce the number of bounce events. Increasing the
damping from 100 to 500 makes the ball bounce only
allowing the simulation to complete in only
You can observe more details about Zero Crossing events from Zero Crossing Explorer. To do this, ensure Zero Crossing option from Configure is selected before profiling the model. Then click Zero Crossing in the Explore section of the Solver Profiler toolstrip. See Zero Crossing Explorer.